1. Open the mask tho make the nose clip at the top, and pull the ear straps with both hands. 2. Hold the mask against your chin to completely cover the nose and mouth. 3. Pull the ear straps behind your ears and adjust them to make you feel comfortable. 4. Use both your hands to adjust the shape of the nose clip. Place your fingers in the middle of the nose clip and press it inwards while moving your fingertips along both sides of the nose clip until it is pressed to fit the bridge of your nose. (making the nose clip get a seal with only one hand may affect the tightness of the mask) 5. Cover the mask with your hand and exhale vigorously, if you feel the air escaping from the nose clip, it is required to tighten the nose clip. if the air escapes from the edge of the mask, readjust the headband to ensure tightness.